SSC GD Constable previous year question
Average of 50 observations was calculated as 23. Three observations 19, 33 and 66 were wrongly taken as 30, 38 and 69. What will be the correct average?
Asked in SSC GD Constable 2024: 26 Feb 2024 Shift 2 · Quantitative Aptitude
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Correct answer: (B) 22.62
Correction = (19+33+66)−(30+38+69) = −19. New sum = 50×23−19=1,131. New average = 1,131/50 = 22.62.
हिंदी में प्रश्न
50 प्रेक्षणों का औसत 23 निकाला गया। उन प्रेक्षणों में से तीन प्रेक्षण 19, 33 और 66 को गलती से 30, 38 और 69 मान लिया गया था। प्रेक्षणों का सही औसत कितना होगा?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 21.78
Correction = (19+33+66)−(30+38+69) = −19. New sum = 50×23−19=1,131. New average = 1,131/50 = 22.62.
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